<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>侧轴对齐方式</title>
    <style>
        .box{
            display: flex;
            /*弹性盒子在侧轴方向如果有尺寸那么就不会拉伸*/
            /*align-items: stretch;*/
            /*align-items: center;*/
            /*align-items: flex-start;*/
            align-items: flex-end;
            height: 300px;
            border: 1px solid #000;
        }
        /*控制第二个 div 侧轴居中对齐*/
        .box div:nth-child(2){
            align-self: center;
        }
        .box div{
            height: 100px;
            width: 200px;
            background-color: pink;
        }
    </style>
</head>
<body>
<div class="box">
    <div>1</div>
    <div>2</div>
    <div>3</div>
</div>
</body>
</html>
